A new foam, able to extinguish raging fire almost instantly, is demonstrated in London.
Full title reads: "FIRE-FIGHTING TEST - Latest extinguisher is demonstrated at London Factory."
A man holding a hose vertically from the ground. Hose is spraying a newly discovered chemical foam which is to put out the fire much more efficiently then the previous substances used for it. Pan across the ground showing layers of white substance while hose is still spraying.
A fire is lit for the demonstration - night shots. Various shots of the fire raging violently. Men with hoses spray the new substance on fire - fire is put out almost instantly - lots of smoke is seen.